{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["engineering feature", "biomedical", "concept or principle", "machine or equipment", "enabling technology", "application"], "input": "For HT1 , due to the B2 → O transformation , the microstructure of heat affected zone was B2 + α2 + O , B2 + residual α2 + O , and B2 + O as the distance from the base metal increased ."}
{"engineering feature": [], "biomedical": [], "concept or principle": ["microstructure", "heat affected zone", "residual"], "machine or equipment": [], "enabling technology": [], "application": []}